Detectives say a parent notified school officials after they saw photos on the 13-year-old victim's phone

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Taylor Welch, 22, was arrested on suspicion of felony lewd acts upon a child and distributing obscene material to a minor, authorities said. He has since been terminated from his substitute teaching position at Hutchinson Middle School in La Mirada, where he reportedly met the 13-year-old victim.

Facebook and text messages are among the media a La Mirada substitute teacher is suspected of using to engage in inappropriate contact with a middle school student, Los Angeles County Sheriff’s officials said.

Taylor Welch, 22, was arrested Tuesday morning at his La Mirada home on suspicion of felony lewd acts upon a child and distributing obscene material to a minor, authorities said.

Welch served as a substitute teacher at Hutchinson Middle School in La Mirada, where he met the 13-year-old girl in his classroom.

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Detectives said they found each other on Facebook and a friendship developed.

That friendship allegedly led to the “unlawful exchange of sexually graphic photographs, live video feed and sexting messages between the suspect and the child,” detectives said in a statement released Tuesday afternoon.